Gravitational, Circular

The definition of gravitational field strength is:

• The region of space surrounding a body where other bodies will feel an attractive force due to it.
• The region of space surrounding a body where other bodies will feel an repulsive force due to it.
• The region of space surrounding a charge where other charges will feel an attractive force due to it.
• The region of space surrounding a charge where other charges will feel an repulsive force due to it.

The closer together the gravitational field lines.....

• the weaker the gravitational field strength
• the stronger the gravitational field strength
• the more repulsive the gravitational field strength

How far out from a mass should the gravitational field lines go....

• to where the gravitational field becomes negligable
• to twice the diameter of the mass
• infinitely far
• to four times the diameter of the mass

In this equation...

• G is the gravitational field strength
• r is the distance between the 2 masses
• F is the repulsive gravitational force
• m is the momentum of the mass

The gravitational field strength of Earth is...

• uniform far away from the surface and radial close to the surface
• uniform close to the surface and radial far away from the surface

Kepler's third law states that....

• An imaginary line drawn from the center of the sun to the center of the planet will sweep out equal areas in equal intervals of time. (The Law of Equal Areas)
• The path of the planets about the sun is elliptical in shape, with the center of the sun being located at one focus. (The Law of Ellipses)
• The ratio of the squares of the periods of any two planets is equal to the ratio of the cubes of their average distances from the sun. (The Law of Harmonies)

A geostationary satellite orbits the Earth....

• once every 24 hours
• once every 10-11 hours
• once every week
• once every 4 weeks

Gravitational potential at a point is....

• the work done in bringing a unit mass from infinity to the point
• the work done in bringing a unit mass from the point to infinity
• the work done in bringing a unit charge from infinity to the point
• the work done in bringing a unit mass from twice the radius of the mass to the point

The area under a Force-distance graph is....

• the energy lost by the mass
• the work done on a mass
• the charge on a mass
• the potential difference of a mass

The minimum velocity required to leave the atmosphere is called the...

• orbital velocity
• ejection velocity
• terminal velocity
• escape velocity